App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 341 · 40 questions

Developer's tip (Big and bold): Our rule: every button is at least 48 px tall. Missing px = 48 − height. Leave space between buttons; use clear words like Save or Send. Strong contrast (black on yellow, white on dark green) is easy to read; similar colours are hard.

1. 1.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 40 px tall
   Start button: 36 px tall
   Cancel button: 36 px tall
   Help button: 64 px tall
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
4. 4.True or false: icons with no meaning is poor button design. (a) True (b) False
5. 5.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
6. 6.True or false: a clear word like Save is poor button design. (a) True (b) False
7. 7.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) light grey on white (d) white on black
8. 8.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on white (c) dark blue on black (d) red on green
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Cancel button: 60 px tall
    Send button: 60 px tall
    Next button: 72 px tall (a) Cancel (b) Back (c) Next (d) Send
13. 13.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
14. 14.True or false: strong colour contrast is good button design. (a) False (b) True
15. 15.True or false: space between buttons is good button design. (a) True (b) False
16. 16.True or false: grey text on grey is poor button design. (a) False (b) True
17. 17.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) red on green (d) black on pale grey
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Next button: 44 px tall
    Send button: 52 px tall
    Save button: 56 px tall
19. 19.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Help button: 44 px tall
    Next button: 68 px tall (a) Next (b) Save (c) Help
21. 21.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Cancel button: 60 px tall
    Back button: 48 px tall (a) Cancel (b) Back (c) Start
23. 23.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Done button: 52 px tall
    Help button: 64 px tall (a) Help (b) Done (c) Save
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Save button: 44 px tall
    Done button: 64 px tall
    Start button: 40 px tall
26. 26.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
27. 27.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
28. 28.True or false: buttons almost touching is good button design. (a) True (b) False
29. 29.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Start button: 32 px tall
    Help button: 72 px tall
    Send button: 52 px tall (a) Help (b) Next (c) Send (d) Start
31. 31.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) yellow on white (d) dark blue on white
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Cancel button: 32 px tall
    Save button: 36 px tall
34. 34.True or false: strong colour contrast is poor button design. (a) True (b) False
35. 35.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Help button: 60 px tall
    Done button: 72 px tall (a) Done (b) Next (c) Help
37. 37.True or false: buttons almost touching is poor button design. (a) True (b) False
38. 38.Which colour pair is hard to read? (a) light grey on white (b) black on pale grey (c) black on yellow (d) white on black
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Back button: 60 px tall
    Next button: 52 px tall
    Cancel button: 32 px tall (a) Cancel (b) Start (c) Back (d) Next
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?

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